In medicine (in the USA anyway), they call the diagnosis of a ridiculously obscure disease a Zebra when it's much more likely that the patient has a common illness presenting uncommon symptoms. We see this a lot with religious folks too.

So, religious folks, to sum up; next time an archaeologist digs up something that ought not to be in it's immediate environment, try to think of a more rational explanation before you convince yourself it's a validating relic for whichever Biblical Chinese whisper you've associated it with. In other words, if you hear hoof beats, try to think horsey not zebra.